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Can you find the missing number in the list by using the mean of the numbers?

What is the missing number?

Step 1: Let us call the missing number N.

Step 2: We know, Mean = (Sum of all numbers)/(Number of numbers);

Therefore, Sum of all numbers = Mean x Number of numbers

→ 1 + N + 3 + 4 + 5 = 3 x 5 → N + 13 = 15 → N = 15-13 → N = 2

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